Valve for internal-combustion engines.



H. G. STARK.

VALVE POR INTERNAL GOMBUSTION ENGINES.

APPLICATION 'FILED MAY. 7 ISHS.

une 1d, 9%.

N 2 SHEETS-SHEET 1 H. G. STARK. VALVE EUR INTERNAL COMBUSTION ENGINES. APPLICATION FILED MAY 7, 1913.

1,100,159. 4 Patented Jun@ 16,1914.

2 SHEETS-SHEET 2.

UNITED STATES QFFICE. l i miner e. strana, or rmnannnrnm, rnNNsYLvairiA.

vALvn-.ron rNTnnNAL-oomnosrron ENGINES.

Specication of Letters Patent,

Patenten June 1e, 1m41.-

Application led may 7, 1913. Serial N0. 766,025.

To all whom it may concern Be it known that I, HARRY G, STARK, a

. citizen of the United States,l residing at lti Philadelphia, in the county 4of Philadelphia and State of Pennsylvania, have invented certain `new and useful Improvements in Valves for Internal-Combustion Engines, of which the following is a specification.

My invention relates to improvements in valves for internal combustion engines, the ohject ofthe invention being to provide a continuously revolving valve coperatng with an intermittently reciprocating valve whereby through a' single port in the engine cylinder, the inlet andv exhaustmaytake place.

A further object is to provide in a valve casing, a continuously revolvingr cylindrical valve having a port therein adapted to communicate with an inlet and an exhaust port in the valve casing, and provide an im.

proved arrangement of coperating continuously revolvingr and intermittently reciprocating valves which nicely time the opening and closing o the inlet and exhaust to permitthe efficient operetionof an explosive engine of theour-cycle type. y

With these, and other ob'iects in view, the invention consists in certain novel features of construction, and combinations and arrangements of parts, as will bemore fully hereinafter. described and pointed out in the claims.

.in the aoconipanyinp` drawings Figure 1 is a view in side elevation illustrating my improvements, Fig. 2 isfa View yiii-longitudinal section. Fig. 3 is a ragmentar viewy in side elevation' at right angles to ig. l.' It is a. view in cross section on the line l--ft of Fig;e l. Fig. 5 is a view in horizontal section on the line 5-5 of Fig. 2, and

, lSign o is a perspective view of cam 27 y The-valve casing' l. is provided in oppoN site sides with inlet and 'exhaust ports 5 and 6 respectively adapted te' be connected withI any suitable manifolds (het shown) and the opening and closing` ofjthese ports is controlled by a rotary cylindrical valve 7 which sleeve 9 which extendsjabove and below the closed end 10 of said valve, andacts sis-1 guide for the stem 11 oifai reciprocating tap-'V pet valve l2, the latteiff 'closing the end ofA the valve casing as clearly'shbwn in Fig. 2.v

valve 7 projects through 'a central opening 13 in a. head 14secured to the 'nd of casingk l. AA yoke l5 is provided on the head 14':

and has a sleeve 16 in which a bearing 17 is y located and through this bearing the 'end' of stem 10 projects.

A key 18 projects through the sleeve 16 il and bearing 17 and through a slot 19 in the stem 11 to permit a reciprocating movement of the stem, but prevent any' rotary moveu ment thereof, and a coiled spring 2() is l0- cated around the stern l0 and the sleeve 16,

upon the tappet valve 12, tending to close the same.

A worm wheel23 is keyed to turn with the end of sleeve 9 projecting beyond head 11i,

and has securedthereto by screws 24, a cylindrical housing 25. A cam 26 is keyed to v`the housingr and -turns freely on stern-11,.

This cam 26 engages a cam 27 keyedtostem l11, so that the continuous rotarymove'ment of wheel 23 and cam 26 imparts angimer-4 4`mitteilt reciprocating' movement to stemll.

The cams 26 and 27 are precisely-alike cxcept that they are reversely positioned. Cam 27 is shown in perspective in Fig 6, and it will be observed that the cam surface extends lhalf way laround the stem, so that',

valve 12 vis open during one half of each revolution .of `wheel 23 andcloeed during'thefremaining half of said'revolutionas will, be the general form and arrangement of parts mo're fully hereinaftei` explained. described Without departing from my 1n- Wheel 23 is continuously revolved by a vention, and hence I do not limit myself worm 28 on a shaft 29. This shaft 29 may to the-precise details set forth, but con- A be driven by, or itself constitute, the time Sider myself at liberty to make such changes 70 shaft Which it is to b e understood is geared and alterations asv fairly fall within the l in two to one ratio with the drive shaft lof spirit and scope of the appended claims. the engine, so that. it requires ytwo cofmplete Having thus described my invention, what revolutions of' the drive shaft toimpart a -claimas new and desire t0 secure by Let` 10 siigle'complete revolution to wheel 23 andV ters Patent is: 75

To prevent any 'possibility of explosion at one end to communicate with an engine Within the valve casing during the compres cvlinder and having inlet and` exhaust ports sion and -firing strokes of the engine pisy, 'in oppositesides thereof, of a hollowrrotary ton, I provide a `curved slot 30 in the end 10 valve inthe casing having a port adapted to 80 of valve 7 which slot during this operation register with the casing ports, saidV valve `of the valve, registerswith a port 31l in having a closed end and anopen end, a valveA head 14. This kport 31 communicates with controllingr the communication of the open a.' passage 32 which is alivays open to the fend of the rotary valve and casing with the outside air, andheiice prevents any confinzengine, and said rotary valve and casing 85- ing of the explosive mixtureV within the having air passages adapted to register durvalve casing during this time i A The length of the slot controls the'time of valve, substantially as described.

open communication with the outside air,l e combination with a casing adapted and I have illustrated Athis slot of sufficient lat one end to communicate with an engine 90 ength to maintain thegopen commun1cacylinderaiid having inlet and exhaust ports 5 valve in the casing having a port adapted to register with the, casing ports, said valve. having a closed end 'and .en open end, a 95 latter partof'theeompression stroke, and

the beginningof the firing stroke of the y engine piston. V

The valves in Figs. 2and 5 'are illustrated in the position they assume during the compression stroke of the engine.

he operation is as-follows: As the suction stroke begins, valve 12 is wide open and valve 7 is beginning to open inlet 5 and continues to open or rather increase the size ot'- this opening during the suction stroke of t e engine piston. During this suction 40 stroke, valve 12 beginsto close andLv when the suction stroke is completed, valve l2 is entirely closed, While valve 7 is Wide open to the inlet. On the compression stroke, valve l2 remains closed and valve 7 moves toentirely close both the inlet and the exhaust 3. The combination -vvith a lcylindrical valve casing having inlet and exhaust ports, 105

ports, a reci rocating valve spring held in normal close position against the end of the 110 w casing, means for imparting a movement to valve l2 remains closed, While va ve 7 be- `the rotary valve, means for openingthe' rey gms to open the exhaust port 6, so that inciprocatiiig valve when the port in the rostantly the exhaust stroke begins, the ex- 2tary valve registers Vwith the parts ji. the

haust 6 will be wide open through valve 7. casing, and said casing and cylindrical valve 115 s the piston' nears the completion of the aving air inlet openings therein adapted firing stroke and is about to begin the exto register during a portion ofthe movement haus't stroke, valve 12 will open, so that the of the rotary valve, substantially as de-y exploded gases may be freely forced out scribed. i

through exhaust port (li. During the ex- Ll-. The lcombination with a cylindrical 120 haust stroke, valve 7 is turning to graduvalve casing having-inlet and exhaust ports, ally close the exhaust port, so that by the of a cylindrical rotary valve fitting within time the exhauststroke is completed, the the casing and having a'prt therein aldapted exhaust .6 Will be entirely closed, and the I y 6o valve" 7 revolved lfar enough to begin the ports, a rcciprocatingvalve spring held in 125 opniig Of the ,inlet Port as above set forth.v normal closed Y he rotaryV valve 7 andthe reciprocating the casing, means for imparting a movevalve l2 therefore operate so as to control ment to the rotary valve, means for opening the inlet and exhaust. the reciprocating valve vvhen the port in Various slight changes might be made iii the rotary valve registers with the ports iu ,1an

CJI

the easing, said cylindrical Valye having a `elosed end with a curved slot therein concentric with the axis of the valve, and said cae ing,r having an air passage in its end adapted to communicate with the slot during a p0rtion of the movement of the rotary valve,

Substantially as described.

5. The Combination with a cylindrical valve casing having inlet and exhaust ports therein, and having an open end adapted to communicate with an engine cylinder, and -a spring held valve controlling the open end of the Cassine', of a eylitnlrieal rotary valve in the easing having a closed end adicent the closed end of the easing, and an open end adjacent the open end o1 the easing, said Valve havinga port, therein adapted to alternately register with the inlet and exhaust valves, and said rotary valve and easing constructed to permit eonnnuni'cation of the interior of the rotary valve with the outside air during' a portion of the movement of the rotary valve, snbetantially as described.

rlhe combination with a cylindrical valve easing havingr inlet and exhaust ports inopposite sides, a cylindrical rotary valve fitting; Within the easing and having a portl therein extending one-fourth around the circumference of the valve and adapted to successively open and close the said ports, a reciprocating valve spring heldin normal closedl position against the end of the casing, a stem on said last-mentioned Valve projecting through the cylindrical Valve, a driving wheel secured to the cylindrical valve, a housing on said driving Wheel, a cani keyed to the housing, a second cam keyed to the stem within the housing and operated by the first-mentioned cam,

'a head on the easing having an air passage therethrough, and a port' Communi eating with the air passage, and said cylindrical valve having a Slot adapted to register with said last-mentioned port during a part of the revolution of said Cylinder valve,

substantially as described. i.

ln testimony whereof I have signed my naine to this specification in the presence -o two subscribing witnesses.

/, HARRY G. STN?? lVitnesses:

MARY E. DrrrU's, CHAS. E. Po'i'rs. 

